Sand-molding apparatus



I sand around thepattern when contained within ailask, and theinventionbeing especially apl s, JARvIs ADAMsoF rITTsBURe,PnNNsYLvANIA".

SyAND-MOLDING APPARATUS.

SPECIFICATION forming part of Letters raient No. 377,005. dareduanury31', 188e. l' i f Application filed March 3l, 1887.l

To all wwm it mag/concern:

,Be itv known that I, S. JARYIs-ADAMS, `of Pittsburg,v in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Sand-Molding Apparatus; and I clo'hercbydeolare thefollowing to be ar full, clear, and exact description thereof.

My invention relates to the manufacture of sandy molds, having specialreference to that class ofmolds which are formed byjarring the plicable,though not exclusively so, kto use with the apparatus for forming moldsfully described in my application for Letters Patent for sand-moldapparatus filed by lne February 9, 1886, Serial No. 191,323. In thatapplication is described a sandln'olding apparatus having the iask, thepattern,vand patternblock secured at one end of the flask and extendingup within the same, and a rod or extension connected to the pattern orits block through the flask, the sand being packed within the iiask byliftingand dropping mechanism above the flask, which engages either withthis rod extending through the fiask, or

which forms this rod, and the base of which enters and engages directlywith the patternl or. pattern-block, and is subsequently withdrawn fromthe'mold' made, thepattern being withdrawn from the opposite end of thefiask.

It is well known that in the manufacture of tubular castings a much moreperfect casting can be obtained where the mold is formedverticallywithin a single flask, so that insteadof there being alongitudinaljoint within the nished mold 'along the edgesof themold-cavity, asis the case where the mold is formed in a two-part flask,one cavityof the mold being molded in eachpart thereof, the bodyotl theymold-cavity is molded by a true cylindrical pattern, and a much moreperfect mold`cavity is formed. There are, however, certain classes ofmolds-such as those for the formation of certain classes ofwagon-boxes-which have enlargements at veach end, while the centralportion or bodyof the casting is of less diam-v eter thanvits ends,which have not heretofore been formed in one-part flasks, itbeingnecessary in molding this class of articles to divide Serial No.233,098. (No'mod'elJi,

NITE STATES PATENT C)Intie113;fE

the patternlongitudinally and mount it upon in each flask, andthenfplace `theftwo half- Inolds together.

`and themolding of the samek vertically, so that r)a more Vperfectandtrulycylindrical orother` 4shaped mold-cavity is obtained and thevlia-v bilityof the'formation of fins on the castingsuch asoccurs whereay match-plate isgemployed-is overcome.

- To this end my Invention consists, generand a two-part patterntherein, thevpavrfs 0f.-

ally,`in.the'combination of a one-par tlask ka match4plate' and formone-half vof vthe mold said pattern being connected within the iiaskduring the formation of the mold, yand ,afterl` the mold is formed beingthen separatedfan'dr withdrawn `from the oppositeends of thelask,

\ whereby a long mold having.enlargementsat-- both ends .may be formedin thisone-partY flask, each part of the pattern being arranged sothatit can be'withdrawn from the finished mold without marring thesanne, so that in this way amore perfect mold-cavity is formed thanwhere the patterns are mounted onthematch'f plate and the two parts ofthe lmoldformedfin l.

separate flasks.

Italsoconsists inother details of construe; tion, as hereinaftermore-specifically set forth'.

'lo enable others skilledin the artto make and use my invention, I willdescribe thesarneA vmore fully, referring to t-he accompanying drawings,in which- Figure l is a vertical section showing a'tlask with myimproved pattern therein andiconneetions thereto forimparti'ng the. jarto ther flask and pattern. f Fig. Z'Yshows-'the manner,

lof withdrawing the parts of the pattern from the one-part liask. Fig. 3is a vertical section of the nished mold ready foricastingg, `Fig. 4 isa longitudinal section showing vanother form `of the patternrillustrating myfinvention, 4

and Fig;v 5 shows thelinished mold formedby this patternand having` thecores inserted ready for casting. A y n Like letters of referenceindicate like parts in each of the figures. v v Y The ask a' is made ofsuitablesize and length, according to the size and length ofthe vpattern and'thenumberof patternsemployed f IOC) within the same flask.At the base of this iiask is the pattern-block b, to which thelowerpart, c, of the two-part pattern is secured, the upper part, d, of saidpattern being secured to the lower pait,'c, by any suitable means andextending up above the iask a.

In employing myinvention I prefer to connect the flask and the patternsto the lifting and dropping mechanism for imparting the jar through thisupper pattern, (Z, the pattern having an extension, as shown in theldrawings, which can either be rigidly secured to the vertically-movingrod e of the lifting and dropping mechanism or be connected thereto by asuitable joint, the form of lifting and dropping mechanism shown beingthe same as that illustrated in my application for patent, Serial No.l9l,323,'above referred to. In the construction shown in Figs. l and 2the upper part, d, of the pattern is connected to the lower part, c,thereof by suitable catches,f, which iit within seats g, formedat theupper end of the lower pattern, c, and secure the two parts rigidlytogether during the formation of the mold, the two parts being furtherheld in line, if so desired, by one part entering within the other, asin Fig. l, so as to preclude the formation of a iin or otherimperfection infthe casting at the junction of the two patterns,or bypins in one part enteringseats in the other part of the pattern. Thesecatches f can be withdrawn by any suitable means operated from the upperend of the pattern, the catches shown in the drawings being mounted onlevers, the handle ends of which are within reach of the operator abovethe flask, and after the formation of the mold these catches may bedrawn in to permit the upper portion, c, to be withdrawn at the upperend ofthe flask.

The particular form of engaging devices between the upper and lowerparts of the pattern may of course be varied, as would be Well known tothe skilled mechanic, any suitable engaging device by which the twoparts can be separated without requiring the turn# ing of either part ofthe pattern when in the sand beingsuitable for the purpose.

The pattern shown in Fig. lis for the molding of' what is known as aWagenborg this box having an enlargement at the base, as at c', and anenlargement at the top, as at d,while the body between theseenlargements is formed of less diameter than the enlargements, and thispart or body, if tapering, as shown, is generally formed as part of thelower pattern, c, though it may of course be formed as part of the,upperpattern, the pattern shown being simply reversed in its position.

In forming the mold by this apparatus apatternblock,with its partpattern c, is secured to the flask, the upper part, d, of the'patternsecured to the lower part, c, thereof, and the flask is filled withsand, a suitable reservoir, k, being preferably employed to feed thesand to the flask and insure the uniform compacting of the same therein.The upper part, d,

of the pattern is then secured to the lifting and dropping mechanism,and by means of this mechanism the flask, with its pattern, is raisedand dropped upon the jarring-block Z until the sand is properlycompacted within the flask. rlhe operator then disconnects the'apparatus from the lifting and dropping mechanism and removes thereservoir, leveling o' 7k the sand e'ven with the upper end of theflask.- He then disconnects the upper part, d, of the pattern from thelower part, c, thereof, and withdraws this part d of the patternvertically i through the top of the mold formed. f lhe lower part, c, ofthe pattern can then be withdrawn from the mold by any suitablemeanssuch as by dropping it out ofthe mold -and the mold is then readyto receive its cores. In the formation of these tubular wagon-boxes itis 8 of course necessary to employ a core extending entirely through thepart of the moldcavity in which the casting is to be formed and tocenter this core properly within the mold-cavity. For this purpose aseator copeprint is generally formed at the base of the mold, as at m, thiseopeprint being molded by the enlargement m at the base of the lowerpart, c, of the pattern, and the core n, when inserted,is brought toacentral position within the mold-cavity by means of a correspondingcore-head, n', which fits within the seat m, the core extending upthrough the mold-cavity and above the enlargement formed by the base dof the upper pattern, d. In order toclose the upper end ofthe mold it isalso necessary to employ a core, p, and the seat p for this core isformed by the portion dz of the pattern d, which is preferably madetapering to form .a tapering seat to direct the core to place, and inorder to center the core n with the core p, I form a core-seat, i",within the core jp, into whichthe upper end ofthe core a enters, thiscore-seat acting to hold the core n centrally within the cavity of themold. After the for- I mation of the mold and the withdrawing of thepatterns as above described, the core u is inserted within, the cavityof the mold, its head a fitting into the seat m at the base of the mold,and the core p is then inserted in the i upper end of the mold-cavity,fitting within the seatp, and the upper end of the core n fitting withinthe corefseat 1' of the core p,when the mold is finished.

In Figs. 4 and is shown another form of I apparatus embodying. myinvention, this appa ratus being for the formation of a mold for castingwhat is known as a foi'ging-die, and the parts thereof correspondingsubstantially tothe two'parts of the apparatus shown in I Figs. 1 and 2,except that a different shape of pattern is employed. In this case thelower part, c, of the pattern isvconnected to the upper part, d, thereofat the narrowest part of the pattern, so that each part of the patterncan be withdrawn from the mold without in.- juring the same, the twoparts of the pattern being connected as above described, and after theformation of the mold the upper part, d,

l 377,005` y p Q3,

is disconnected from the lower part, c, and' withdrawn through the upperpart of the fiask.' The flask is then turned over and the Vlower part,c, thereof Withdrawn, and suitable cores, n p, are inserted within-seatsm p', formed-in the mold, these cores being of proper shape to form thetop and bottom faces ofthe die, the bottom core, n, being generallyformed of a metal block or ehill,.7 which acts to chill and case-hardenone face of the die, while the other core, p, is providedwith a suitabledovetail extension which forms a dovetail recessin the finished casting,by means of which it can be secured to the forging apparatus. Asheretofore formed this class of `molds required y, what is known as .afour-part77 ask for its manufacture, and it was exceedingly difficult tobring all the parts in proper relative position, so that the casting ofthis'class of arti-y cles presented difficulties which are entirelyovercome by my improved apparatus.

- I am thus enabled byemploylng atwopar pattern within the-onefpartflask to mold the* articles to be formed much more accurately and toovercome the` formation kof fins along the edges of the finishedcasting, while at the same time I am enabled to form themolds more y irapidly, and, as all the parts are arranged so that the mold can beformed by jarring, I am enabled to form more perfect molds, and canemploy p'raotically unskilled labor for the work.

for holding said parts together, whereby the l parts of the pattern areheld*togetherduringv molding and released after molding, substantiallyas and for the purpose set forth.` f

2. In sand-molding apparatus, the combination of the `flask (t, thepattern-block oarrying the pattern c, the patterned, and engagingdevices between the patterns and the-pattern d, substantially as 'andforthe purposes yset forth n 3. Iusand-molding apparatus, the combithe endof the pattern c, and suitable engagl'k nation of ythe fiask a, thepattern=block carry f l ing the pattern c, the pattern d, fittingaround" ing devices between said patterns, substan'- tially as and forthe purpose set forth.

lIn testimony whereof I, thesaid S. JARV'IS ADAMS, have yhereunto setmy'vhand.'

Y ,s.A Mavis ADAMS; y

Witnessesz' JAMEsI. KAY, f n J. NEGLEY COOKE.

